Interaction of discharges with electrode surfaces in dielectric liquids: application to nanoparticle synthesis

Belmonte, T.; Hamdan, Ahmad; Kosior, Francis; Noël, Cédric; Henrion, G.

doi:10.1088/0022-3727/47/22/224016

Cited by 70 publications

(56 citation statements)

References 116 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When we take the example of in-liquid plasmas generated by nanosecond discharges, these discharges are generated with or without gaseous bubbles, and usually run in spark mode [16][17][18] (i.e., the plasma channel connects two electrodes) or in streamer mode [4][5][6] (i.e., the plasma channel is connected to one electrode). In the case of a spark mode, the plasma-electrode interaction is relatively strong, which leads to erosion issue [19][20][21] and reduces a lifetime of electrodes. In addition, a contamination of plasma treated liquid due to materials from electrode erosion may cause problems, particularly when the size of the particles is very small, and classical purification methods fail to remove them.…”

Section: Introductionmentioning

confidence: 99%

Microwave Plasma Jet in Water: Characterization and Feasibility to Wastewater Treatment

Hamdan

Liu

Suk

2018

Plasma Chem Plasma Process

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Microwave Plasma Jet in Water: Characterization and Feasibility to Wastewater Treatment

Hamdan

Liu

Suk

2018

Plasma Chem Plasma Process

View full text Add to dashboard Cite

“…Pattern formation and self-organization is also often found in plasmas interacting with liquid surfaces, of relevance in applications ranging from water decontamination and activation [35,36], to nanoparticle and material synthesis [37][38][39][40][41], and medicine [42,43]. These discharges have shown a high propensity for pattern formation, which has been observed when the liquid acts as a cathode or as an anode; for low-and high-pressure plasmas of inert and molecular gases; and for diverse liquid electrodes [33,34,44].…”

Section: Pattern Formation and Self-organization In Plasmas 221 Plmentioning

confidence: 99%

Pattern formation and self-organization in plasmas interacting with surfaces

Trelles¹

2016

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Pattern formation and self-organization are fascinating phenomena commonly observed in diverse types of biological, chemical and physical systems, including plasmas. These phenomena are often responsible for the occurrence of coherent structures found in nature, such as recirculation cells and spot arrangements; and their understanding and control can have important implications in technology, e.g. from determining the uniformity of plasma surface treatments to electrode erosion rates. This review comprises theoretical, computational and experimental investigations of the formation of spatiotemporal patterns that result from self-organization events due to the interaction of low-temperature plasmas in contact with confining or intervening surfaces, particularly electrodes. The basic definitions associated to pattern formation and self-organization are provided, as well as some of the characteristics of these phenomena within natural and technological contexts, especially those specific to plasmas. Phenomenological aspects of pattern formation include the competition between production/forcing and dissipation/transport processes, as well as nonequilibrium, stability, bifurcation and nonlinear interactions. The mathematical modeling of pattern formation in plasmas has encompassed from theoretical approaches and canonical models, such as reaction-diffusion systems, to drift-diffusion and nonequilibrium fluid flow models. The computational simulation of pattern formation phenomena imposes distinct challenges to numerical methods, such as high sensitivity to numerical approximations and the occurrence of multiple solutions. Representative experimental and numerical investigations of pattern formation and self-organization in diverse types of low-temperature electrical discharges (low and high pressure glow, dielectric barrier and arc discharges, etc) in contact with solid and liquid electrodes are reviewed. Notably, plasmas in contact with liquids, found in diverse emerging applications ranging from nanomaterial synthesis to medicine, show marked sensitivity to pattern formation and a broadened range of controlling parameters. The results related to the characteristics of the patterns, such as their geometric configuration and static or dynamic nature; as well as their controlling factors, including gas composition, driving voltage and current, electrode cooling, and imposed gas flow, are summarized and discussed. The article finalizes with an outlook of the research area, including theoretical, computational, and experimental needs to advance the field.

show abstract

“…In this work, we present results about the synthesis of nano-objects formed by erosion of Cu28Ag72 electrodes with spark discharges in liquid nitrogen. This process, whose yields may reach grams per hour, is one of the most efficient to produce nano-objects [15,16]. The Cu28Ag72 is a two-phase mixture: XRD results of the untreated material indicate that it is made of Ag96.4Cu3.6 and Cu99.4Ag0.6 phases (composition expressed in at.%).…”

Section: Introductionmentioning

confidence: 99%

Nano-objects synthesized from Cu, Ag and Cu28Ag72 electrodes by submerged discharges in liquid nitrogen

Kabbara

Ghanbaja

Noël

et al. 2018

Materials Chemistry and Physics

View full text Add to dashboard Cite

Discharges in liquid nitrogen between 2 electrodes made of either Cu, Ag or Cu28Ag72 enable the production of several types of comparable nano-objects. First, Cu nanoparticles (NPs) with sizes close to 5±4 nm nm and 40±10 nm are obtained with Cu electrodes and get oxidized in the air to form CuO after liquid evaporation. With Cu28Ag72 electrodes, copper contains a small amount of silver that inhibits oxidation. Next, silver nanoparticles are spherical but when doped with copper, they are facetted. Silver-containing nanowires have very similar features whether they are synthesized with silver or CuAg electrodes. They are made by assembly of NPs. Ag nanosheets are either single crystals in the case of CuAg electrodes or assembly of NPs in the case of silver electrodes. Finally, silver nanorods with traces of copper are only found with CuAg electrodes.Time-resolved optical emission spectroscopy indicates that the optical thickness decreases when copper is added to silver, lines appearing immediately after breakdown and not only after emission of a broad continuum. Emission of lines belonging to the N II system is then observed. The energy deposited being nearly constant, the structure of the discharge is assumed to be changed.

show abstract

Interaction of discharges with electrode surfaces in dielectric liquids: application to nanoparticle synthesis

Cited by 70 publications

References 116 publications

Microwave Plasma Jet in Water: Characterization and Feasibility to Wastewater Treatment

Microwave Plasma Jet in Water: Characterization and Feasibility to Wastewater Treatment

Pattern formation and self-organization in plasmas interacting with surfaces

Nano-objects synthesized from Cu, Ag and Cu28Ag72 electrodes by submerged discharges in liquid nitrogen

Contact Info

Product

Resources

About